Product Overview This leave-in, Kérastase Resistance Volumifique Expansion Spray is designed to provide body & softness for natural volume & revitalising internal strength. Benefits Created by experts, this boosting formula remodels each hair fibre & gives natural volume. Hair has a light cosmetic feel & an anti-static effect, resulting in a glamorous, luxurious finish. Key Technology Vita-Ciment® technology gives internal strength to the hair, whilst Contouring Polymers provide natural, supple hold.